Comparing timeseries with average week

[1915 (Martin Fredriksson)]

I'm comparing logs in Timelion with the current week and the week before, using the offset=-1w syntax.

However I would also like to compare these values with the average week over a period of one year.

Can I somehow chain 52 timeseries and divide them by 52 or is there a simpler solution?

Currently my graph looks like this.

[simianhacker (Chris Cowan)]

There isn't an automated way to do that you will have to try and manually build that statement.